英文關鍵字
background
bathroom
building
construction
cut
cutting
drain
drainage
equipment
helmet
house
housing
industry
infrastructure
installing
knife
maintenance
man
manual
material
mess
occupation
one
people
person
pipe
pipeline
pipes
plastic
plumber
plumbing
precision
professional
protection
pvc
repair
sewage
sewer
tool
tools
tube
water
white
work
worker
working